Table 3 Trial Time Used Regression. To provide a normal error term distribution, the Trial Time Used values underwent a reciprocal transformation. A linear regression was then performed relating Trial Time Used to both the controller (“Intact Hand” vs “KNN”) and an interaction between the controller and time in weeks, which was suggested by an ANOVA to be the best linear regression model. The “Intact Hand” controller performed better in Trial Time Used compared to the “KNN” controller, but there was no performance degradation over time in either, as indicated by the interaction term coefficients
Model | 1/Time Used = (Intercept) + (Cf)Controller + (Cw0/w1)Week | ||
|---|---|---|---|
Coefficient Estimate | Std. Error | p | |
(Intercept) | 0.426 | 0.01 | ≪0.001 |
ControllerCoefficient Cf 0-Intact, 1-KNN | −0.113 | 0.02 | ≪0.001 |
Controller:Week Cw0 (Intact) | 0.031 | 0.01 | 0.001 |
Controller:Week Cw1 (KNN) | 0.003 | 0.001 | 0.04 |